diff --git a/src/VERSION b/src/VERSION
index 99543d9..01c70a3 100644
--- a/src/VERSION
+++ b/src/VERSION
@@ -1 +1 @@
-"0.4.5"
+"0.4.6"
diff --git a/src/_imports.pyx b/src/_imports.pyx
index c4d47a8..5b20993 100644
--- a/src/_imports.pyx
+++ b/src/_imports.pyx
@@ -118,7 +118,7 @@
     Py_UCS4 Py_UNICODE_JOIN_SURROGATES(Py_UCS4 high, Py_UCS4 low) nogil
 
     object PyUnicode_FromKindAndData(int kind, const void *buf, Py_ssize_t size)
-    char *PyUnicode_AsUTF8AndSize(object o, Py_ssize_t *size) except NULL
+    const char *PyUnicode_AsUTF8AndSize(object o, Py_ssize_t *size) except NULL
 
     object PyDict_SetDefault(object p, object key, object value)